package com.sky.service.impl;

import cn.hutool.core.bean.BeanUtil;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;
import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //  后期需要进行md5加密，然后再进行比对
        //使用spring框架提供的工具类进行md5加密，传参需要转为字节数组
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }


    public void save(EmployeeDTO employeeDTO) {
        //DTO对象转为实体对象
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);  //把DTO的属性拷贝到实体对象中
        //设置账号状态  默认正常
        employee.setStatus(StatusConstant.ENABLE);
        //设置密码  默认123456  使用md5加密
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
/*        //创建时间，修改时间
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        // 创建人ID，修改人ID
        //从ThreadLocal中获取当前登录用户ID
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());*/
        //由 aop 自动填充

        //调用mapper层
        employeeMapper.insert(employee);
    }

    /**
     * 分页查询
     *
     * @param employeePageQueryDTO
     * @return
     */
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //pagehelper分页
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);

        long total = page.getTotal();
        List<Employee> records = page.getResult();

        //格式化创建/修改时间

        return new PageResult(total, records);
    }

    /**
     * 启用禁用员工账号
     *
     * @param status
     * @param id
     */
    public void tabStatus(Integer status, Long id) {
        //builder构建器创建employee对象，传入要修改的信息
        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                .build();

        //mapper层通用update方法，创建实体对象，传入属性值修改
        employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工
     * @param id
     * @return
     */
    public Employee queryById(Long id) {
        Employee employee = employeeMapper.queryById(id);
        //将密码设置为****，提高安全性
        employee.setPassword("****");
        return employee;
    }

    /**
     * 修改员工信息
     * @param employeeDTO
     */
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
/*        //修改时间
        employee.setUpdateTime(LocalDateTime.now());
        //修改人id
        employee.setUpdateUser(BaseContext.getCurrentId());*/
        //由 aop 自动填充

        employeeMapper.update(employee);
    }
}
